Vtocanizing-press mold



J. H. BIRKENBEUEL.

VULCANIZING PRESS MOLD.

APPLICATION FILED DEC-16.1918.

Patented July 29, 1919.

IN V EN TOR.

' the lower end of cylinder C shouldered UNITED STATES PATENT OFFICE.

" JULIA n. IBIRKENBEUEL, or PORTLAND,

' vumnmzmaranss MOLD.

Specification of Letters Patent.

To all whom it may cor wern:

Be it known that I, JULIA H. BIRKEN- BEUEL, a citizen ofthe United States, in the city of Portland, the county of Multnomah, and State of Oregon, have invented a new and useful Vulcanizing-Press Mold.

My invention relates more particularly to the 'art of vulcanizing rubber tires, but can be used to include any form of molded rubber goods.

The objects of my invention are primarily to simplify the construction of a vulcanizing apparatus to render it possible to concentrate the vulcanizing action as desired, to reduce the amount of labor entailed in loadingand unloading the press as well as making the operation less disagreeable.

To accomplish these results I have arranged the elements of my invention in the following manner. I Referring to the drawing, Figure 1 is an elevation .of the complete device with hydraulic .press shown 'in section; Fig. 2 is a plan of the device shown'in Fig. 1 with cover plate of press removed; Fig. 3 is an elevation of one unit of mold; Fig. 4 is a plan of the mold shown injFig. 3;Fig. 5 is an enlarged detail of section through 5-5 in Fig. 2; Fig. 6 is a detail showing a modified form of my device forv vulcanizing the tread more than the rim portion of the tire.

Similar letters and numbers of reference refer to the same or similar parts throughout the several views. 7

C is a hydraulic cylinder to which water is admitted by way of pipe 0 which also serves as an exhaust pipe. The plug C in being the usual closure means employed at this point. the upper end of cylinder C is the flan e C from which project the lugs- C whic receive the lower end of the rods C which are used to unite the cover plate G". The rod C being slightly to support its own weight and that of the cover plate C". The lugs C on .the cover plate C, receive the upper end of the rods 6.

The mold ring M is a hollow jacketed ring, havingthe ports M in" the walls M connecting the hollow portion within the jacket, with the open central portion W within the ring M while the circular outside wall M is intact. The curved portion M in the top face M and the bottom face the molds 1n and out. of

"tents T a ainst cylinder C with the 1 press without the manufacture of OREGON.

M, of the mold ring M is adapted to receive the object to be molded.

R is the usual hydraulic ram, upon which is mounted the ram table R which is equipped with the pipe R which acts both as a supply and waste for the well W F are ferrules for uniting the jacketed portion of t e mold rings as well as alining the rings as shown in Fig. 6.

The operation of my device is as follows: The ram table R is moved to its lower position by allowing water to escape from cylinder-C by way of pipe C Packing T is placed on the ram table R and the mold ring M is placed upon said packing T The proper amount of material T for a tire is placed in the trough M which is thus presented. The second mold ring M is now placed upon the first and its trough supplied with the material to be molded, and so on until the capacity reached, it being seen that a complete mold is formed every to the stack.

Between the top mold ring M and the cover plate C is placed the packing T Pressure is then admitted to the cylinder 0 and the ram table R raises and presses the entire stack of mold rings M and their conthe cover plate C".

It will e noticed that the -molds being Patented July '29, 1919. Application flled December 16, 1918. Serial No. 267,048. I

.of the press is placed one above the other with the tires forming gaskets between themform a pres- .sure tight sealed by'the ram table R and the pressure- Steam or hot water is now well W the ends of which are cover plate 0.

admitted to the well W by way of the pipe R and the heating medium is allowed to fill the hollow portion of the mold rings M by way of the openings M The vulcanizing process is now taking place and will continue to do so until the heat and the pressure are cut off from the device, the heat, of course, being cut off firstand the pressure as soon as danger of the escaping steam or hot water is past. The mold rings M will then descend and be exposed soas to be easily removable from the opening of a single bolt or locking mechanism.

It will be, appreciated by anyone familiar with the vulcanizing methods in common use that this is a decid (1 forward step in tires and molded rubber goods. An equally important feature being the ability of the manufacturer to vulthe canize invarying degrees according to'the .amount of exposure to the heat, which in the tire industry alone, is a boon, since it is most desirable to vulcanize to a greater degree on the tread than on the rim.

It will be seen in Fi 6 that by modifying the shape of the mo d rings so that heat will be supplied on the tread portion while the interior or rim portion can be subjected to temperature reducing mediums such as water or air, if desired, it will cause the greater degree of vulcanizing to take place on the tread where it' is most needed.

The ferrules F are tapered to insure a tight jointbetween the mold rings, which are used in this form of my device much in the manner of ferrules which are used to join radiator sections. V

en articles other than tires are to'be formed and vulcanized they ,are merely distributed around an inclosure and joined by a fin as are drop forgin s for the purpose of forming a packing etween the mold rings, which fins can be removed by a trimmer built into the molds,'as is common in the art.

which forms the part which is to be Vulcan ized least, exposed to a cooling medium conta ned in a central well, a means for sealing said well, a means for compressing said rubber within the molds, a means for supplying ings in the inner wall, for admitting the heating agent from the central well to the hollow portion of said mold.

3. A mold means consisting of.two or more hollow jacketed mold rings having mating grooves formed in each of their flat faces, a means for connecting the jacketed portions of the molds and alining their mated portions, which means is adapted to carry t e heating agent and which consists of a ferrule, tapered at each end, a central well, formed within the moldrings, a means for sealing the top and bottom of said well, a means for supplying heat to the hol- Iow jacketed portion of the molds, a means for supplyinga cooling medium to the central well and a means for compressing the fabricated materials between the mold rings.

4. In a vulcanizer, the combination of a hydraulic press and a mold means, comprlsing two or more hollow jacketed mold IlIl s, having mating grooves of the shape of t e articles to be molded, formed in the flat surfaces of said rings, and the interior walls of said mold rings having ports 'to allow a circulation of the heating medium from the central well through thehollow jacket of the mold, means for-sealing the top and bottom of the well formed by the stack of mold rings, consisting of a packing placed between the upper ring and the cover plateof the press and a second ring placed between the lower ring and the ram table of the press, and a means for alining the molds consisting of dowel pins in the'flat faces 01 v the moldrin IA H. BIRKENBEUEL. 

